Codes for 2000 Silhouette

Hi all, this is my first time here in the forum and I would like to thank you in advance. I have the following codes: P0122, P0172, P0410, and P0418. I found out what the codes meant, but don't know how to fix them. If anyone can help me, I do appreciate. My van will have inspection next month and I need to fix these codes before inspection.

Welcome to AF.These codes in general do not point to a specific repair or parts replacement, addt'l diagnostics are required to pinpoint the problem, the lean code can be caused by air getting into the intake system, vacuum leak, misfires, poor injector performance. 410 is an issue with the aux air, bad solenoid, check valve, blown fuse, bad air pump motor.